FIELD: metallurgy.
SUBSTANCE: main point of modification process invention is in directed influence of high-temperature air plasma jet with providing of high speeds of heating and cooling of surface layer, establishment of produce traverse speed relatively to plasmatron and distances from plasmatron till produce, not committing during the treatment of metal surface burning-off. Modification conditions: current 160-180 A, voltage 160-180 V, produce travel speed V=25-100 cm/min, distance from nozzle section till produce surface H=30-50 mm are established experimentally.
EFFECT: hardening of surface layer for considerable depth, increasing of steel surfaces performance attributes.
1 dwg
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